Answer: Hydrogen fluoride (HF) has a boiling point of 19°C, while water (H2O) has a boiling point of 100°C. The difference in boiling points is due to hydrogen bonding
Step-by-step explanation:
Hydrogen bonding: H2O, HF, and NH3 all exhibit hydrogen bonding, while the others do not.
Number of hydrogen bonds: H2O can form 4 hydrogen bonds, while HF can form 2.
Energy required to break bonds: To boil liquid water, all hydrogen bonds have to be broken, which requires a large amount of energy. In HF, all hydrogen bonds do not need to be broken, so a lesser amount of energy is required.